Commercial Site Grading & Drainage Planning

Design for Proper Water Flow. Protect Your Investment.

Effective drainage starts long before the first pipe is installed or the first curb is poured—it starts with the right site grading and drainage plan. Improper grading and inadequate drainage design are among the top causes of pavement failure, building damage, and costly stormwater compliance issues on commercial properties.
At Diversified Drainage, we partner with property owners, developers, contractors, and engineers to provide expert site grading and drainage planning services across Minnesota. Whether you're developing a new site or correcting long-standing drainage problems, we help ensure your property is built to manage water the right way—today and for years to come.


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drain tile installation in progress
/OUR PROCESS

About the Service: Site Grading & Drainage Planning

Proper site drainage is a combination of intentional grading, engineered drainage systems, and flow control elements that work together to manage surface and subsurface water.Our services include:
Site Grading Assessment & Planning
- Evaluate existing topography and site flow paths
- Identify grading adjustments to improve drainage performance
- Design grading plans to promote positive surface flow away from structures, pavements, and critical areas
Drainage System Integration
- Coordinate grading with subsurface drain tile, catch basins, storm drains, and retention/detention systems
- Ensure grading supports stormwater code compliance and water quality goals
Erosion Control & Soil Stabilization
- Design grading to minimize erosion risks during and after construction
- Recommend soil stabilization methods where needed
Drainage Retrofit & Remediation Planning
- Assess drainage failures caused by poor grading or site alterations
- Develop corrective grading and drainage plans for existing properties
Commercial Drainage Benefits

Why Grading & Planning Matter for Commercial Drainage

Avoid ponding, freeze/thaw heaving, and sub-base failures that destroy parking lots and roadways.
Ensure water flows away from structures, not toward them—reducing risk of infiltration and foundation movement.
Well-planned grading and drainage reduce ongoing maintenance and repair needs across your site.
Proper grading is critical to meeting flow rate limits, detention requirements, and water quality standards.
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Built for Minnesota Conditions

Our grading and drainage plans are tailored to perform in the unique conditions of Minnesota commercial sites, including:
Heavy clay soils with poor infiltration
Flat and low-lying sites
Freeze/thaw cycles that challenge conventional grading
High-intensity rain events and snowmelt

Who We Serve

We provide site grading and drainage planning for:
Commercial developments
Office & retail centers
Industrial & warehouse properties
Multi-family housing developments
Institutional & educational campuses
Municipal properties & roadway projects

Why Choose Diversified Drainage? 

a pair of excavators working to install a commercial drainage solution

25+ Years of Experience

With over two decades of hands-on experience, we’ve seen—and solved—every kind of drainage issue for both homes and commercial properties.

Fully Licensed & Insured

Our team is fully licensed, insured, and qualified to work on residential neighborhoods, large-scale commercial sites, and everything in between.

Local Expertise

As a Plymouth-based company, we understand the soil, slope, and drainage challenges unique to Minnesota properties.

Effective Solution Design

We provide high-quality drainage systems that are both cost-effective and built to perform season after season.

Customer-first Service

From homeowners to property managers, we prioritize clear communication, honest recommendations, and long-term results.

Ready to Optimize Your Site’s Drainage?

Whether you're designing a new site or correcting existing drainage problems, Diversified Drainage brings the experience and field knowledge to get it done right. Let’s ensure your property is protected and performs as intended.
(763) 443-0575
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Commercial Drainage FAQs

Proper stormwater management starts with the right system—and a clear understanding of how it works. Explore these FAQs to learn more about catch basins and storm drains.

Why is site grading so important for drainage?

Grading controls how water moves across your site. Without proper grading, even the best drainage system can fail to perform.

Can grading adjustments be made to existing commercial sites?

Yes. We frequently design corrective grading solutions for older properties with drainage problems.

Do you provide grading plans for new construction?

We collaborate with developers, engineers, and GCs to provide grading and drainage recommendations that align with site goals and stormwater compliance needs.

What types of commercial sites benefit most from grading & drainage planning?

All sites benefit, but grading is especially critical on flat lots, clay-heavy soils, large paved areas, and properties with sensitive surrounding land uses.